Selection toolbar is gone
The select options are still available at the top of the 3d viewport, while the old version you had shows text buttons, these have now been replaced with icons.

You can find the options for the current tool in three places, in the 3D viewport header, the tool tab of the properties region and the active tool settings tab in the properties editor.



Note that we have four select tools, Select, Select Box, Select Circle and Select Lasso. The select tool has no options to show and the circle tool has less options. If you can't find the select tool options, it may be because you have the wrong select tool.